Toshiba strata CT Installation & Maintenance Manual page 372

Glossary
Term
BRCS
BRI
CT
CHSUB XXX
CHSUE XXX
H
CLASS
C
CLI
CODECs
DADM
D-channel
DDCB
DDSS
DDI Line
GL-2
Dual-tone Multi-frequency Receiver—An optional upgrade to the
system common control unit (BCU) that provides Dual-tone Multi-
Frequency (DTMF) receivers for system Direct Inward System Access
(DISA) Exchange lines, E&M Tie lines, Auto attendant announcement
devices, remote change of call forward-external destination, and
stations and other peripherals that connect to standard telephone
circuits. The BRCS comes in three models: the BRCS-4 (provides four
DTMF receivers), the BRCS-8 (eight DTMF receivers), and the BRCS-
12 (12 DTMF receivers).
Basic Rate Interface—ISDN line with 2B + 1D channel. BRI lines can
have a U-interface with RJ11 jacks and single twisted pair wiring, or
RJ45 four pair S/T interface wiring.
Computer Telephony.
Base Cabinet—Unit that houses the processor PCB (RCTU or BCU),
as well as universal slots for station, line, and option PCBs. The Base
Cabinet also contains a power supply that provides power for all of the
stations and peripherals connected to the base cabinet PCBs.
Expansion Cabinet—Optional unit that has ten universal slots for
station, line, and option PCBs. The expansion cabinet has a power
supply that furnishes power for all of the stations and peripherals
connected to the expansion cabinet PCBs. As many as four expansion
cabinets can be added to the system.
Custom Local Area Signalling Services—Defines a number of features
offered by local telephone companies.
Calling Line Identification—Telephone number of the calling party sent
to the Strata CT system over incoming loop start Exchange lines.
Coder/Decoder—Semiconductors that allow the system to process
analog-to-digital and digital-to-analogue conversions.
Digital Add-on-Module—Optional device that connects to 2000 &
2500-series digital telephones to provide the telephones with 20
flexible feature buttons that can be assigned individually for Direct
Station Selection, System and Personal Speed Dial, and Exchange
line access.
Used in ISDN. This channel transmits call control information (out-of-
band signalling) for B-channels. The D-channel is a logical, not a
physical channel.
Digital Door Phone/Lock Control Unit—A peripheral hardware unit
compatible with designated digital telephone circuits that supports
optional door phones (MDFBs) and provides door lock control.
Digital Direct Station Selection Console—A device that helps facilitate
the processing of a heavy load of incoming calls. The DDSS connects
only to designated digital telephone circuits, and is associated with a
digital telephone.
Direct Dialling Inward line.
Definition
Strata CT I&M Manual October 2000